// Startup variables
var imageTag = false;
var theSelection = false;

// Check for Browser & Platform for PC & IE specific bits
// More details from: http://www.mozilla.org/docs/web-developer/sniffer/browser_type.html
var clientPC = navigator.userAgent.toLowerCase(); // Get client info
var clientVer = parseInt(navigator.appVersion); // Get browser version

var is_ie = ((clientPC.indexOf("msie") != -1) && (clientPC.indexOf("opera") == -1));
var is_nav = ((clientPC.indexOf('mozilla')!=-1) && (clientPC.indexOf('spoofer')==-1)
                && (clientPC.indexOf('compatible') == -1) && (clientPC.indexOf('opera')==-1)
                && (clientPC.indexOf('webtv')==-1) && (clientPC.indexOf('hotjava')==-1));                
var is_moz = 0;

var is_win = ((clientPC.indexOf("win")!=-1) || (clientPC.indexOf("16bit") != -1));
var is_mac = (clientPC.indexOf("mac")!=-1);

// Define the bbCode tags
bbcode = new Array();
bbtags = new Array('[b]','[/b]','[i]','[/i]','[u]','[/u]','[quote]','[/quote]','[code]','[/code]','[list]','[/list]','[list=]','[/list]','[img]','[/img]','[url]','[/url]');
imageTag = false;

// Start add - BBCodes & smilies enhancement MOD
var baseHeight;
function initInsertions() {
	if (is_ie && typeof(baseHeight) != 'number') baseHeight = document.selection.createRange().duplicate().boundingHeight;
}
// End add - BBCodes & smilies enhancement MOD

// Shows the help messages in the helpline window
function helpline(help) {
	document.post.helpbox.value = eval(help + "_help");
}


// Replacement for arrayname.length property
function getarraysize(thearray) {
	for (i = 0; i < thearray.length; i++) {
		if ((thearray[i] == "undefined") || (thearray[i] == "") || (thearray[i] == null))
			return i;
		}
	return thearray.length;
}

// Replacement for arrayname.push(value) not implemented in IE until version 5.5
// Appends element to the array
function arraypush(thearray,value) {
	thearray[ getarraysize(thearray) ] = value;
}

// Replacement for arrayname.pop() not implemented in IE until version 5.5
// Removes and returns the last element of an array
function arraypop(thearray) {
	thearraysize = getarraysize(thearray);
	retval = thearray[thearraysize - 1];
	delete thearray[thearraysize - 1];
	return retval;
}

function emoticon(text) {
	var txtarea = document.post.message;
	text = ' ' + text + ' ';
	if (txtarea.createTextRange && txtarea.caretPos) {
// Start add - BBCodes & smilies enhancement MOD
		if (baseHeight != txtarea.caretPos.boundingHeight) {
			txtarea.focus();
			storeCaret(txtarea);
		}
// End add - BBCodes & smilies enhancement MOD		
		var caretPos = txtarea.caretPos;
		caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? caretPos.text + text + ' ' : caretPos.text + text;
		txtarea.focus();
// Start add - BBCodes & smilies enhancement MOD
	} else if ((txtarea.selectionEnd | txtarea.selectionEnd == 0) && (txtarea.selectionStart | txtarea.selectionStart == 0))
	{ 
		mozInsert(txtarea, text, "");
		return;
// End add - BBCodes & smilies enhancement MOD		
	} else {
		txtarea.value  += text;
		txtarea.focus();
	}
}

function bbfontstyle(bbopen, bbclose) {
	var txtarea = document.post.message;

	if ((clientVer >= 4) && is_ie && is_win) {
		theSelection = document.selection.createRange().text;
		if (!theSelection) {
// Start add - BBCodes & smilies enhancement MOD
			if (txtarea.createTextRange && txtarea.caretPos) {
				if (baseHeight != txtarea.caretPos.boundingHeight) {
					txtarea.focus();
					storeCaret(txtarea);
				}
				var caretPos = txtarea.caretPos;
				var text = bbopen + bbclose;
				caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? caretPos.text + text + ' ' : caretPos.text + text;
			} else
// End add - BBCodes & smilies enhancement MOD		
			txtarea.value += bbopen + bbclose;
			txtarea.focus();
			return;
		}
		document.selection.createRange().text = bbopen + theSelection + bbclose;
		txtarea.focus();
		return;
	}
//	else if (txtarea.selectionEnd && (txtarea.selectionEnd - txtarea.selectionStart > 0))
//	{
//		mozWrap(txtarea, bbopen, bbclose);
// Start replacement - BBCodes & smilies enhancement MOD
	else if ((txtarea.selectionEnd | txtarea.selectionEnd == 0) && (txtarea.selectionStart | txtarea.selectionStart == 0))
	{
		mozInsert(txtarea, bbopen, bbclose);
// End replacement - BBCodes & smilies enhancement MOD
		return;
	}
	else
	{
		txtarea.value += bbopen + bbclose;
		txtarea.focus();
	}
	storeCaret(txtarea);
}


function bbstyle(bbnumber) {
	var txtarea = document.post.message;

	txtarea.focus();
	donotinsert = false;
	theSelection = false;
	bblast = 0;

	if (bbnumber == -1) { // Close all open tags & default button names
		while (bbcode[0]) {
			butnumber = arraypop(bbcode) - 1;
// Start add - BBCodes & smilies enhancement MOD
			if (txtarea.createTextRange && txtarea.caretPos) {
				if (baseHeight != txtarea.caretPos.boundingHeight) {
					txtarea.focus();
					storeCaret(txtarea);
				}
				var caretPos = txtarea.caretPos;
				var text = bbtags[butnumber + 1];
				caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? caretPos.text + text + ' ' : caretPos.text + text;
			} else
			if ((txtarea.selectionEnd | txtarea.selectionEnd == 0) && (txtarea.selectionStart | txtarea.selectionStart == 0))
			{ 
				mozInsert(txtarea, bbtags[butnumber + 1], "");
			} else
// End add - BBCodes & smilies enhancement MOD			
			txtarea.value += bbtags[butnumber + 1];
			buttext = eval('document.post.addbbcode' + butnumber + '.value');
			eval('document.post.addbbcode' + butnumber + '.value ="' + buttext.substr(0,(buttext.length - 1)) + '"');
		}
		imageTag = false; // All tags are closed including image tags :D
		txtarea.focus();
		return;
	}

	if ((clientVer >= 4) && is_ie && is_win)
	{
		theSelection = document.selection.createRange().text; // Get text selection
		if (theSelection) {
			// Add tags around selection
			document.selection.createRange().text = bbtags[bbnumber] + theSelection + bbtags[bbnumber+1];
			txtarea.focus();
			theSelection = '';
			return;
		}
	}
	else if (txtarea.selectionEnd && (txtarea.selectionEnd - txtarea.selectionStart > 0))
	{
		mozInsert(txtarea, bbtags[bbnumber], bbtags[bbnumber+1]);
		return;
	}
	
	// Find last occurance of an open tag the same as the one just clicked
	for (i = 0; i < bbcode.length; i++) {
		if (bbcode[i] == bbnumber+1) {
			bblast = i;
			donotinsert = true;
		}
	}

	if (donotinsert) {		// Close all open tags up to the one just clicked & default button names
		while (bbcode[bblast]) {
				butnumber = arraypop(bbcode) - 1;
// Start add - BBCodes & smilies enhancement MOD
				if (txtarea.createTextRange && txtarea.caretPos) {
					if (baseHeight != txtarea.caretPos.boundingHeight) {
						txtarea.focus();
						storeCaret(txtarea);
					}
					var caretPos = txtarea.caretPos;
					var text = bbtags[butnumber + 1];
					caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? caretPos.text + text + ' ' : caretPos.text + text;
				} else
				if ((txtarea.selectionEnd | txtarea.selectionEnd == 0) && (txtarea.selectionStart | txtarea.selectionStart == 0))
				{ 
					mozInsert(txtarea, bbtags[butnumber + 1], "");
				} else
// End add - BBCodes & smilies enhancement MOD				
				txtarea.value += bbtags[butnumber + 1];
				buttext = eval('document.post.addbbcode' + butnumber + '.value');
				eval('document.post.addbbcode' + butnumber + '.value ="' + buttext.substr(0,(buttext.length - 1)) + '"');
				imageTag = false;
			}
			txtarea.focus();
			return;
	} else { // Open tags
	
		if (imageTag && (bbnumber != 14)) {		// Close image tag before adding another
// Start add - BBCodes & smilies enhancement MOD
			if (txtarea.createTextRange && txtarea.caretPos) {
				if (baseHeight != txtarea.caretPos.boundingHeight) {
					txtarea.focus();
					storeCaret(txtarea);
				}
				var caretPos = txtarea.caretPos;
				var text = bbtags[15];
				caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? caretPos.text + text + ' ' : caretPos.text + text;
			} else
			if ((txtarea.selectionEnd | txtarea.selectionEnd == 0) && (txtarea.selectionStart | txtarea.selectionStart == 0))
			{ 
				mozInsert(txtarea, bbtags[15], "");
			} else
// End add - BBCodes & smilies enhancement MOD		
			txtarea.value += bbtags[15];
			lastValue = arraypop(bbcode) - 1;	// Remove the close image tag from the list
			document.post.addbbcode14.value = "Img";	// Return button back to normal state
			imageTag = false;
		}
		
		// Open tag

			var text = bbtags[bbnumber];
			if (txtarea.createTextRange && txtarea.caretPos) {
				if (baseHeight != txtarea.caretPos.boundingHeight) {
					txtarea.focus();
					storeCaret(txtarea);
				}
				var caretPos = txtarea.caretPos;
				caretPos.text = caretPos.text.charAt(caretPos.text.length - 1) == ' ' ? caretPos.text + text + ' ' : caretPos.text + text;
			} else
			if ((txtarea.selectionEnd | txtarea.selectionEnd == 0) && (txtarea.selectionStart | txtarea.selectionStart == 0))
			{ 
				mozInsert(txtarea, bbtags[bbnumber], "");
			} else
		txtarea.value += bbtags[bbnumber];
		if ((bbnumber == 14) && (imageTag == false)) imageTag = 1; // Check to stop additional tags after an unclosed image tag
		arraypush(bbcode,bbnumber+1);
		eval('document.post.addbbcode'+bbnumber+'.value += "*"');

		txtarea.focus();
		return;
	}
	storeCaret(txtarea);
}

// From http://www.massless.org/mozedit/
function mozWrap(txtarea, open, close)
{
	var selLength = txtarea.textLength;
	var selStart = txtarea.selectionStart;
	var selEnd = txtarea.selectionEnd;
	if (selEnd == 1 || selEnd == 2) 
		selEnd = selLength;

	var s1 = (txtarea.value).substring(0,selStart);
	var s2 = (txtarea.value).substring(selStart, selEnd)
	var s3 = (txtarea.value).substring(selEnd, selLength);
	txtarea.value = s1 + open + s2 + close + s3;
	return;
}

// Insert at Claret position. Code from
// http://www.faqts.com/knowledge_base/view.phtml/aid/1052/fid/130
function storeCaret(textEl) {
	if (textEl.createTextRange) textEl.caretPos = document.selection.createRange().duplicate();
}

// Start add - BBCodes & smilies enhancement MOD
function mozInsert(txtarea, openTag, closeTag)
{
        var scrollTop = ( typeof(txtarea.scrollTop) == 'number' ? txtarea.scrollTop : -1 );

        if (txtarea.selectionEnd > txtarea.value.length) { txtarea.selectionEnd = txtarea.value.length; }

        var startPos = txtarea.selectionStart; 
        var endPos = txtarea.selectionEnd+openTag.length; 

        txtarea.value=txtarea.value.slice(0,startPos)+openTag+txtarea.value.slice(startPos); 
        txtarea.value=txtarea.value.slice(0,endPos)+closeTag+txtarea.value.slice(endPos); 

        txtarea.selectionStart = startPos+openTag.length; 
        txtarea.selectionEnd = endPos; 
        txtarea.focus();

        if( scrollTop >= 0 ) { txtarea.scrollTop = scrollTop; }
}
// End add - BBCodes & smilies enhancement MOD